The levels of oxidized DNA base 8-oxodeoxyguanosine (8-OHdG) in (A) liver and (B) brain tissues of mice. Bars represent mean ±1.96 (SD) with distribution of samples per group in scatter blot column. (A) Interval of confidence at 95% was as follow: Control: 1.15+/−1.96 (0.30), NAC: 1.02 +/− 1.96 (0.19), PQ: 1.46 +/− 1.96 (0.19), and PQ+NAC: 0.85 +/− 1.96 (0.22). The sample size of the experimental groups was as follow: Control (N=5), NAC (N=5), PQ (N=5), and PQ+NAC (N=4). (B) Interval of confidence at 95% were as follow: Control: 1.50+/−1.96 (0.31), NAC: 1.33 +/− 1.96 (0.20), PQ: 1.82 +/− 1.96 (0.34), and PQ+NAC: 1.37 +/− 1.96 (0.25). The sample size of the experimental groups was as follow: Control (N=4), NAC (N=5), PQ (N=4), and PQ+NAC (N=4).